Improvement in devices for converting motion



R. GRAY. Device for Oonvertin g Motlon No. 214,503. I Patented April 22,I879.

N-PETERS. PHOTOJ-IYNDGRAFNER. WASHNGTON. D, Q

U ITED STATES PATENT (OFFICE;

RICHARD GRAY, or BLooMINeron, ILLINOIS, ASSIGNOR or o'vE-IIALE Hrs RIGHTTO JEFFERSON DUNN, or SAME PLACE.

IMPROVEMENT IN DEVICES FOR CONVERTING MOTION.

. Specification forming part of Letters Patent No.

214,503, dated April 22,1879 papplication filed March 25, 1879.

.To all whom it may concern:

Be it known that I, RICHARD GRAY, of Bloomington, in the county ofMcLean and 9 State of Illinois, have invented certain new and .usefulImprovements in Devices for (Jonverting Motion 5 and I do hereby declarethe following to be a full, clear, and exact description of the same,reference being made to the accompanying drawings, forming a part ofthis specification, and in which- Figure l is a front elevation with aportion of the frame broken away. Fig. 2 is a side elevation with aportion of the frame broken away. Fig, 3 is a top View. Fig. 4 is adetail sectional view.

This invention relates to improvements in the class of devices adaptedfor. converting a reciption consists in the general construction andcombination of parts, all as will be hereinafter fully described, andspecifically pointed out in the claims.

In the drawings, A represents an upright frame, in the lower part ofwhich a stationary shaft,B,is mounted, and upon which atreadle,

0,. is journaled in the usual manner. D represents the usual stud-shaft,upon which the band-wheel E is mounted, and upon the hub of said wheelare rigidly secured two ratchetwheel's, F F, and between saidratchet-wheels upon the wheel-hub are mounted the loose pulleys G H,each pulley being provided on its outer side with two pawls, I I,arranged to engage with the ratchet-wheels F. J represents an endlesscord or band passing under and thence over the pulley G, and over andthence under the pulley H, and thence through and over the outer sidesof the slotted and perforated plates or rods K L.

The above-described arrangement of the endless cord or band around thepulleys is for the purpose (when said cord or band is moved) to turn thepulleys in opposite directions, one being turned forward as the other isturned backward, which motions of said pulleys, through the medium ofthepawls, cause the ratchet-wheels to act alternately to impart acontinuous forward rotary motion to the band-wheel.

Heretofore in this class of devices as applied tothe treadlesofsewing-machines a rectangular frame has been employed, through whichthe cord or band passes in connection with an auxiliary cross rod orbar, to which the ends of the cord or band are connected, adapted to beadjusted on the treadle-rod for regulating the tension of said cord orband. This frame has, however, been found to be objectionable,-

in contact with the braces or fixed parts of some classes of machines,thus requiring changes in the construction of such machines in order tosuccessfully apply theframe thereto.

In order to overcome the above-described objections, a curved or bentrod or bar, M, is employed, having pivoted, respectively, to its lowerand upper ends the slotted and perforated plates or rods K L, throughwhich the endless band or cord passes. The lower end of the rod or bar Mis connected to the treadlcrod or pitman M by a screw-couplin g, N, theends of said rods M M being provided with screw-threads, by which theyare screwed into said coupling, it having a little soft metal droppedtherein, so that the ends of the rods will jam against the soft metaland produce suflicient friction to retain the rod M in any desiredposition it' may be turned or placed. The curve or bend in the rod M issufficient to the stud-shaft, bringing it therefore in front or oneither side thereof, which movement to interfere with the braces orfixed parts of the machines, thus permitting its ready application .tosuch machines without changing their construction; also, by the use ofthe end less cord or band and the pivoted plates or rods K L, throughand over, which the cord or band passes, it is always free to adaptitself to the pulleys without requiring any nice adjustment, as is thecase with the use of the rectangular frame above referred to.

K represents a thumb-nut arranged on the for the reason that in itsmovements it comes 7 permit of its being turned around the end ofpermits said rod or bar being so turned as not treadle-rod or pitman,above the slotted plate or rod K, for the purpose of tightening the cordor band in case it becomes loose.

0 represents a lever provided with a slot, 0, in one end, by which itcan be pivoted to the treadle-shaft without removing the shaft uponwhich it is mounted from the machine. The other end of said lever O isconnected to an extension, 13, of the treadle. This lever is providedwith a series of holes, 0, into which the lower end of the treadle-rodor pitman is fulcrumed, the object of said holes being for the purposeof changing the fulcrum of the pitman or treadle-rod, whereby anincreased or decreased rotary motion may be given to the band-wheel orshaft without changing the sweep or velocity of the treadle.

I am aware that a similar pivoted lever used in connection with thetreadle and crank movement in sewing and other machines, for

the purpose of changing the velocity of the rotary motion of theband-wheel or shaft, is old; but in such arrangement it is absolutelynecessary to change the sweep of the treadle, and such- I desire to bedistinctly understood I as not claiming as my invention; but,

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is-

1. Indevices for converting reciprocating rectilinear motion intocontinuous rotary motion, a pivoted lever'provided with a series ofholes, whereby an increased or decreased rotary motion may be producedby changing the fulcrum of the pitman or treadle-rod without changingthe sweep or'velocity of the treadle, substantially as specified.

2. In devices for changing reciprocating rectilinear motion intocontinuous rotary motion, the combination, with the pulleys, pawls,ratchet-wheels, and cord or band, of a pivoted, curved, or bent rod, M,provided with the pivoted, slotted, and perforated rods or plates K L,substantially as and for the purpose herein shown and described.

3. The combination, with the treadle, bandwheel or shaft provided withthe ratchetwheels and pulleys having pawls, and the cord or band, ofintermediate connecting mechanism, consisting of the pivoted, curved, orbent rod or bar M, provided with the pivoted plates K L, treadle-rod M,and screw-coupling N, substantially as and for the purpose herein shownand described.

RICHARD GRAY.

Witnesses:

D. (J. ALLEN, G. BINKENBURG.

